摘要
用溶胶 -凝胶法在玻璃表面制备了均匀透明的纳米TiO2 薄膜 .采用高压汞灯为光源 ,敞口固定床反应器对水中染料亚甲基蓝进行了光催化氧化实验 .实验结果表明 :随着涂膜次数的增加 ,薄膜TiO2 负载量增加 ,锐钛矿晶相粒径增大 .TiO2 薄膜对亚甲基蓝氧化降解具有较高的光催化活性 ,降解反应符合一级速率方程 .
In this paper,the uniform transparent nanometer TiO 2/glass photocatalytic thin films were prepared via sol-gel processing.The photocatalytic oxidation of methylene blue was investigated in an open fixed-bed photoreactor illuminated with high pressure mercury lamp.It was found that the increase of cycles of dip-coating can cause the increase of TiO 2 loading,as well as the grain growth of TiO 2 anatase phase.The nanometer TiO 2/glass thin film showed high photocatalytical activity in degradation of methylene blue.The photodegradation follows first order kinetics.The dark absorption and photodegradation mechanism of methylene blue were discussed.
出处
《山东师范大学学报（自然科学版）》
CAS
2003年第1期39-42,共4页
Journal of Shandong Normal University(Natural Science)
基金
山东省自然科学基金资助项目 (Q98B0 712 3 )
